A18g — English: Mikenas, Flohr, 4…d4

1.c4 Nf6 2.Nc3 e6 3.e4 d5 4.e5 d4 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte b5, paire de fous.
Faiblesses adverses : Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, arriéré d2, 5 pièces non développées (G1, C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nf3 — Développer Ng1
● d3 — Libérer Bc1
● Bd3 — Développer Bf1

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : paire de fous.
Faiblesses adverses : arriéré d2, Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, 5 pièces non développées (B8, C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bd7 — PRIORITÉ: libérer le Bc8 (...Bd7, b6+Bb7, ...Bf5)
● ...Nbd7 — Développer Nb8
● ...Be7 — Développer Bf8
● ...c6 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A18g — Mikenas Flohr

1.c4 Nf6 2.Nc3 e6 3.e4 d5 4.e5 d4

Eval: [+0.18]

Les coups candidats

5.exf6 — 98.6% (4026 parties)

Ambassadeurs : Cramling, Dan (11x), Lalic, Bogdan (11x), Sitorus, Yosua (10x), Ynojosa Aponte, Felix Jose (10x), Bernal Varela, Nelson (9x), Aronian, Levon (9x), Zarnicki, Pablo (8x), Aleksandrov Ivanchev, Aleksandar (8x)

5.Nb5 — 0.7% (30 parties)

Ambassadeurs : Cserba, Andras (3x), Laco, Giuseppe (2x), Vecsey, Zoltan (1x), Prchal, Jan (1x), Shishov, Maxim Al (1x), Demuria, Alexandr (1x), Wind, Maurits (1x), Kuijf, Marinus (1x)

5.Nce2 — 0.4% (16 parties)

Ambassadeurs : Joplin, William (1x), Tritch (1x), Ditt, Egon (1x), Weise, Dieter (1x), Holland, Christopher (1x), Lalic, Susan K (1x), Ljubisavljevic, Zivojin Z (1x), Vukovic, Milosav (1x)

5.Nb1 — 0.2% (9 parties)

Ambassadeurs : Basman, Michael J (1x), Aabel Thomas Eapen (1x), Sergeeva, Tatyana (1x), Khamrakulova, Mavguida (1x), Monnens, Georges (1x), Collette, Benjamin (1x), Halfmann, Peter (1x), Heinert, Eugen (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5.exf6	5.Nb5	5.Nce2	5.Nb1
<1800	65	98%	2%	—	—
1800-2200	1236	98%	1%	1%	0%
2200-2600	1801	100%	0%	0%	—
2600+	133	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	5.exf6	5.Nb5	5.Nce2	5.Nb1
1920s	1	100%	—	—	—
1930s	35	97%	3%	—	—
1940s	33	100%	—	—	—
1950s	41	98%	2%	—	—
1960s	52	94%	—	4%	2%
1970s	114	96%	4%	1%	—
1980s	306	100%	—	0%	—
1990s	714	99%	1%	0%	0%
2000s	983	98%	1%	0%	1%
2010s	1340	99%	0%	0%	0%
2020s	463	99%	0%	0%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5.exf6	99%	99%	+0.3%
5.Nb5	0%	0%	-0.2%
5.Nce2	0%	0%	+0.1%
5.Nb1	0%	0%	-0.1%

Joueurs célèbres

Champions du monde dans cette position

Anand, Viswanathan — 4 parties
Hou, Yifan — 4 parties
Kasparov, Garry — 3 parties
Tal, Mikhail — 2 parties
Kramnik, Vladimir — 2 parties
Ding, Liren — 2 parties
Ju, Wenjun — 2 parties
Karpov, Aleksandr — 1 partie
Karpov, Anatoly — 1 partie
Carlsen, Magnus — 1 partie
Gukesh D — 1 partie

Parties historiques

5.exf6 — 98.6% (4026 parties)

1929 — Antze, Oskar vs Porath, Yosef — 1-0 — Duisburg
1930 — Opocensky, Karel vs Skalicka, Karel — 1-0 — Prague-ch Prague CZE
1930 — Mieses, Jacques vs Thomas, George Alan — 0-1 — Frankfurt GER
1930 — Nimzowitsch, Aron vs List, Paul — 1-0 — Frankfurt GER
1930 — Wertheim, Willem F vs Spanjaard, Eduard — 0-1 — The Hague NED

5.Nb5 — 0.7% (30 parties)

1933 — Vecsey, Zoltan vs Prchal, Jan — 1-0 — Prague CZE
1957 — Shishov, Maxim Al vs Demuria, Alexandr — 1-0 — Tbilisi GEO
1970 — Norby, Peter H. vs Brinck-Claussen, Bjorn — 1/2-1/2 — Copenhagen DEN
1975 — Leiter, Rabbi Abba vs Brynhammar, Hilding — 0-1 — ?
1977 — Neubert, Gerhard vs Murach K — 1-0 — corr DDR-cup4

5.Nce2 — 0.4% (16 parties)

1964 — Joplin, William vs Tritch — 0-1 — Oakland
1964 — Ditt, Egon vs Weise, Dieter — 0-1 — Ingolstadt
1979 — Ljubisavljevic, Zivojin Z vs Vukovic, Milosav — 1-0 — Smederevska Palanka
1989 — Holland, Christopher vs Lalic, Susan K — 1-0 — Londen open
1994 — Budnikov, Alexandar vs Van der Sterren, Paul — 0-1 — Reykjavik ISL

5.Nb1 — 0.2% (9 parties)

1968 — Basman, Michael J vs Aabel Thomas Eapen — 1/2-1/2 — Bristol ch-BCF
1996 — Sergeeva, Tatyana vs Khamrakulova, Mavguida — 1-0 — Erevan ARM
2003 — Monnens, Georges vs Collette, Benjamin — 1/2-1/2 — ?
2006 — Egorov, Makar Ser vs Willms, Jeff — 0-1 — Kitchener CAN
2007 — Novkovic, Marko vs Dimitrijevic, Miroljub — 1-0 — Belgrade SRB

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	● d2	—
Chaînes	—	● f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0)	—
Cases faibles	—	—
Centre	—	● d4 (1v0), ● d5 (3v2)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 2)
Bc8		● Bc8 Non développé (mob. 1)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	5 (g1, c1, f1, a1, h1)	5 (b8, c8, f8, a8, h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre !	● Au centre !
Droits de roque	O-O / O-O-O	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● c4-c5, ● d2-d3, ● f2-f3	● …c7-c6, ● …c7-c5

Partie
1931 Bled – Round 1 – Nimzowitsch, Aron – 1/2-1/2 – Kostic, Boris – G4 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Nd4 10. Nxd4 Bxd4
1933 Folkestone Olympiad 5th – Round 3.14 – Vaitonis, Povilas – 0-1 – Monticelli, Mario – G23 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Qe7 10. O-O-O Bd7
1934 Leningrad – Round 1 – Ragozin, Viacheslav – 1-0 – Sozin, Veniamin – G14 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 c5 9. Nf3 Nc6 10. Bd3 Nd4
1937 Stockholm ol – Round 18 – Paulsen, Aleksander Karlsen – 1/2-1/2 – Van Scheltinga, Theo – G99 1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Qxd2 Qxd2+ 8. Bxd2 Bxg7 9. O-O-O Nc6 10. f4 b6
1939 Leningrad ch-URS – Round 13 – Chekhover, Vitaly – 0-1 – Belavenets, Sergey – G103 1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 c5 9. Nf3 Nc6 10. O-O-O Bd7
1939 Leningrad ch-URS – Round 6 – Ragozin, Viacheslav – 1/2-1/2 – Dubinin, Peter – G43 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 c5 9. Nf3 Nc6 10. O-O-O Qe7
1939 Leningrad/Moscow – Round 9 – Ragozin, Viacheslav – 0-1 – Makogonov, Vladimir – G63 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 c5 9. Bc3 Bxc3+ 10. Qxc3 Rg8
1946 Augsburg 1st – Round 17 – Troeger, Paul – 1/2-1/2 – Saemisch, Friedrich – G32 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Qe7 10. Be2 Bd7
1946 Stockholm 4647 – Round ? – Skold, Kristian – 1-0 – Skarp Gunnar – G1 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 c5 7. d4 cxd4 8. cxd4 Nc6 9. Nf3 Qxf6 10. a3 h6
1947 Mar del Plata – Round 9 – Eliskases, Erich – 1/2-1/2 – Guimard, Carlos E – G75 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. g3 e5 8. Bg2 Bc5 9. Nf3 O-O 10. Qe2 Nc6
1949 URS Ch, semi final – Round 13 – Cherepkov, Alexander V – 1-0 – Bonch-Osmolovsky, Mikhail – G100 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 c5 9. Nf3 Nc6 10. Bd3 f5
1950 Moscow Ch – Round 1 – Golovko, Alexandr – 0-1 – Chistiakov, Alexander – G3 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Nd4 10. Nxd4 Bxd4
1954 Prague zt – Round 18 – Basjuni, Sad Zaglul – 0-1 – Minev, Nikolay N – G100 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Qxd2 Qxd2+ 8. Bxd2 Bxg7 9. O-O-O Nc6 10. Nf3 Bd7
1955 Budapest – Round 1 – Tapaszto Binet, Laszlo – 1-0 – Gereben, Erno – G8 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Qxd2 Qxd2+ 8. Bxd2 Bxg7 9. O-O-O Bd7 10. Nf3 Nc6
1955 Long Beach US Open – Round 11 – Drexel, Gustave – 0-1 – Zalys, Ignas – G9 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Qxd2 Qxd2+ 8. Bxd2 Bxg7 9. O-O-O b6 10. Bf4 c5
1955 Manhattan CC Ch 5556 – Round 11 – Siegel, Markus – 1/2-1/2 – Lombardy, William J – G48 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 gxf6 7. d4 Nc6 8. Ne2 Qd7 9. Ng3 Be7 10. Qg4 b6
1955 URS Ch sf Moscow RUS – Round 1 – Kholmov, Ratmir D – 1/2-1/2 – Bellin, Bruno – G2 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Bd7 10. Bd3 Qe7
1957 Minsk zt – Round 5 – Sokolsky, Alexey – 1-0 – Barshauskas, Vitautas – G34 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Nd4 10. Nxd4 Bxd4
1958 YUG Ch sf – Round 5 – Vasiljevic, Milos – 1/2-1/2 – Udovcic, Mijo – G13 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Qxd2 Qxd2+ 8. Bxd2 Bxg7 9. O-O-O c5 10. g3 Nc6
1959 Argentina – Round 2 – Marini, Luis – 1/2-1/2 – Bazan, Osvaldo – G8 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Qe7 10. Bd3 h6
1959 Kiel – Round 2 – Lamprecht, Karl – 1-0 – Saemisch, Friedrich – G3 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Qxd2 Qxd2+ 8. Bxd2 Bxg7 9. O-O-O Nc6 10. Nf3 Bd7
1962 Hastings II – Round 4 – Cafferty, Bernard – 1-0 – Milner Barry, Philip – G9 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 Nc6 9. Nf3 Qe7 10. Bd3 Bd7
1962 Zuerich Seniors – Round ? – Grob, Henry – 1-0 – Seitz, Jakob Adolf – G7 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 gxf6 7. d4 c5 8. d5 Nd7 9. g3 f5 10. Bg2 Bg7
1964 Buenos Aires Ch – Round ? – Studenetzky, Moises – 1/2-1/2 – Wexler, Bernardo – G4 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qc2 c5 9. Nf3 Nc6 10. O-O-O Qb6
1968 Bristol ch-BCF – Round 4 – Basman, Michael J – 1/2-1/2 – Aabel Thomas Eapen – G45 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. Nb1 Nfd7 6. f4 Nxe5 7. fxe5 Qh4+ 8. g3 Qe4+ 9. Kf2 Qxh1 10. Nf3 d3
30. ECC Open 2014 – Round 3.6 – Timofeev, Artyom – 1/2-1/2 – Van Wely, Loek – G62 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. Bd3 e5 8. Nf3 Na6 9. O-O Bd6 10. Bc2 Bg4
6. Norway Chess 2018 – Round 7.1 – Caruana, Fabiano – 1/2-1/2 – Nakamura, Hikaru – G28 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. Bd3 Bd7 8. Nf3 Bc6 9. Bc2 Bxf3 10. Qxf3 Qxf3
Cote d'Ivoire Rapid 2019 – Round 3.1 – Carlsen, Magnus – 1/2-1/2 – Nakamura, Hikaru – G11 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qb3 Nc6 9. Nf3 Qe7 10. Bd3 O-O
Saint Louis Blitz 2018 – Round 14.1 – Caruana, Fabiano – 1-0 – Anand, Viswanathan – G66 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. Bd3 Bd7 8. Nf3 Bc6 9. Be2 Bd6 10. d4 b6
World Rapid 2016 – Round 2.22 – Nakamura, Hikaru – 1/2-1/2 – Wei, Yi – G62 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. Bd3 Nc6 8. Be4 e5 9. Qf3 Qxf3 10. Nxf3 f6
World Rapid 2019 – Round 7.90 – Gukesh D – 0-1 – Zarnicki, Pablo – G491 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. fxg7 cxd2+ 7. Bxd2 Bxg7 8. Qb3 Nc6 9. Nf3 a5 10. O-O-O a4

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